采用化学共沉法和TiCl4水解法制备CoFe2O4磁粒子和核壳型CoFe2O4/TiO2光催化剂,在100℃烘干,350℃焙烧2 h,在紫外光源和太阳光照射下所制备的CoFe2O4/TiO2光催化剂显示出较高的甲基橙降解能力,利用外加磁场很容易将CoFe2O4/TiO2光催化剂和所处理的污水分离,并可循环使用.TEM和XRD分析结果表明:CoFe2O4粒径约为20nm,TiO2包覆的CoFe2O4粒子的粒径约为30～40nm,TiO2包覆层约为10～20nm.
The core -shell CoFe2O4/TiO2 magnetic nano -photocatalyst were prepared by hydrolysis of tita-nium tetrachloride precursor in the presence of the CoFe2O4 magnetic particles, and then be dried blew 100℃ and calcined at 350℃for 2h. The prepared photoeatalysts were easy to be separated from treated wa-ter by using an external magnetic field and shown high catalytic activity for the degradation of methyl orange in water under UV and visible - light irradiation. The morphology and the crystalline structure of the CoFe2O4TiO2 were characterized by transmission electron microscopy (TEM) and X -ray diffraction (XRD). The size of CoFe2.O4 particles was about 20 nm. The diameter of CoFe2O4/TiO2 particles is in the range of 30 -40 nm. So the shell of TiO2 enwraps closely around the core and the thickness is in the range of 10-20nm.
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